我尝试的是将此代码添加到css:
table th.headerSortUp:after {
content: " ↑";
}
table th.headerSortDown:after {
content: " ↓";
}
但这不会显示箭头"↑" and "↓"
,而是显示 html-entities:"↑" and "↓"
甚至更好的是我在这里找到的向上和向下箭头: http ://graphemica.com/search?q=ARROW+TO+BAR